discourse/lib/freedom_patches/translate_accelerator.rb

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# This patch performs 2 functions
#
# 1. It caches all translations which drastically improves
# translation performance in an LRU cache
#
# 2. It patches I18n so it only loads the translations it needs
# on demand
#
# This patch depends on the convention that locale yml files must be named [locale_name].yml
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module I18n
module Backend
class Simple
def available_locales
# in case you are wondering this is:
# Dir.glob( File.join(Rails.root, 'config', 'locales', 'client.*.yml') )
# .map {|x| x.split('.')[-2]}.sort
LocaleSiteSetting.supported_locales.map(&:to_sym)
end
end
module Base
# force explicit loading
def load_translations(*filenames)
unless filenames.empty?
filenames.flatten.each { |filename| load_file(filename) }
end
end
end
end
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# this accelerates translation a tiny bit (halves the time it takes)
class << self
alias_method :translate_no_cache, :translate
alias_method :reload_no_cache!, :reload!
LRU_CACHE_SIZE = 2000
def reload!
@loaded_locales = []
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@cache = nil
reload_no_cache!
end
LOAD_MUTEX = Mutex.new
def load_locale(locale)
LOAD_MUTEX.synchronize do
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return if @loaded_locales.include?(locale)
if @loaded_locales.empty?
# load all rb files
I18n.backend.load_translations(I18n.load_path.grep(/\.rb$/))
end
# load it
I18n.backend.load_translations(I18n.load_path.grep Regexp.new("\\.#{locale}\\.yml$"))
@loaded_locales << locale
end
end
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def translate(*args)
@cache ||= LruRedux::ThreadSafeCache.new(LRU_CACHE_SIZE)
found = true
k = [args, config.locale, config.backend.object_id]
t = @cache.fetch(k) { found = false }
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unless found
load_locale(config.locale) unless @loaded_locales.include?(config.locale)
begin
t = translate_no_cache(*args)
rescue MissingInterpolationArgument
options = args.last.is_a?(Hash) ? args.pop.dup : {}
options.merge!(locale: config.default_locale)
key = args.shift
t = translate_no_cache(key, options)
ensure
t = @cache[k] = t.freeze
end
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end
t
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end
alias_method :t, :translate
end
end